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How to register

Registration for ICHA2025 is available through the 4ID Congress Play registration platform.

Registration platforms

If you already have an account, log in here to access the platform. If you want to create an account here

If you need assistance, write to our help desk at support@4id.cl

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  • ISSHA members
    Current ISSHA members are eligible for a discounted registration rate. To access this reduced rate, please provide your ISSHA membership number during the registration process.
  • Non members
    If you are not yet an ISSHA member but intend to join, please enter “####” in the ISSHA membership number field when completing your ICHA2025 registration.
  • Students
    For students (undergraduate and postgraduate), they must attach their regular student certificate

Registration Period

  • Early Registration: January 13, 2025 – May 16, 2025
  • Late Registration: May 17, 2025 – September 19, 2025
Important: If you plan to submit an abstract, the submission deadline is June 1, 2025.

Registration Fees

 
Early bird registration
(13-Jan ∼ 16- May)
Late registration
(17-May ∼ 19- Sep)
Regular Participant (ISSHA member)USD 625USD 700
Student Participant (ISSHA member)USD 370USD 405
Regular Participant (Non member)USD 750USD 845
Student Participant (Non member)USD 480USD 520
Accompanying personUSD 160
Registration Fees Include:
  • Admission to all scientific sessions
  • Abstract book (PDF)
  • Conference bag with materials
  • Icebreaker event attendance
  • Welcome reception attendance
  • ISSHA auction attendance
  • Lunches and coffee breaks
  • Registration fee receipt
  • Official attendance certificate
  • Applicable consumption tax

Note: The registration fee does not include the Gala Dinner or tours.

Accompanying person registration fees include

  • Conference bag
  • Attendance at the Ice breaker event
  • Attendance at the Welcome reception
  • Payment receipts (invoice)

Note: Accompanying persons are not permitted to access the scientific sessions of the conference.

Session Topics

  1. Taxonomy and Phylogeny
  2. Ecology, Biology, and Biogeography
  3. Microbiomes, Biological & Chemical Interactions
  4. Ciguatera and Benthic HABs
  5. Cyanobacteria & Freshwater HABs
  6. Ichthyotoxic HABs
  7. HABs in a Changing World & Emerging Issues
  8. Toxins & Other Microalgal Metabolites
  9. Toxicity
  10. Risk Assessment for Marine and Freshwater Phycotoxins
  11. New Methods & Technology (OMICS, chemical, bioassays, etc)
  12. In situ Monitoring, Remote Observing Systems & Modeling
  13. Multidisciplinary Studies
  14. Public communication of science and Citizen Science on HABs
  15. Socio-Economic and Health Public Impacts
  16. Biotechnology & Natural Products
  17. Prevention, Control and Mitigation (PCM-HABs)

Gala Dinner

The Gala Dinner, scheduled for October 24, 2025, is not included in the registration fee. However, it can be booked during the registration process.

Cancellation policy

Please note the following:

  • Registrations that have already been paid, duplicate registrations, or refunds cannot be processed.
  • Changes to registration details that would result in a fee adjustment cannot be accommodated once payment has been completed.
  • We encourage careful review of your registration details before submitting payment.



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